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Aneroid wall barometer in carved wood brass and glass late 19th century.

About the Item

Wall-mounted aneroid barometer made of carved wood, brass, and glass, an instrument whose pressure-sensitive organ is a metal box called a barometric capsule. English manufacture of the late 19th century. Good condition, working. Diameter cm 23.3 - inches 9.2, thickness cm 4.5 - inches 1.7. This is an ancient measuring instrument whose pressure-sensitive organ is a metal box called a barometric capsule. The capsule contracts or expands as a result of pressure changes, and its movements are transmitted to an indicating pointer by a mechanical system. The development of this type of barometer was due to Bourdon, a French inventor and industrialist (Paris 1808-1884). He founded a factory in Paris in 1835 to build steam engines; in 1849 he invented the metal manometer, to which he linked his name, and in 1853 a type of aneroid barometer. Notes Since ancient times man, as a farmer and navigator, has observed and attempted to predict weather patterns. The scientific study of the changes occurring in the atmosphere began in the mid-17th century in connection with experiments tending to prove the existence of a vacuum, which ancient philosophers denied because "nature abhors a vacuum!" Evangelista Torricelli (1608-1647), mathematician and physicist, a disciple of Galileo, was the first in 1643 to build an instrument capable of detecting changes in air pressure, which he understood to be related to changes in weather.

Dimensions:

Height: 1.7 in (4.32 cm)Diameter: 9.2 in (23.37 cm)

Materials and Techniques:

Wood

Period:

Late 19th Century

Date of Manufacture:

1890

Condition:

Wear consistent with age and use.

Seller Location:

Milan, IT